AlNyhus
Silver $$ Contributor
Respectfully, I think you're missing what I was trying to convey.How can it steer you wrong. Your tuning a specific bullet to a specific barrel. Accurate Shooting, your not looking for a place to seat mass produced ammunition. Lack of common sense in folks gives me a headache. Your looking for a repeatable starting point. The square mark is not to give you that point. The idea of a square mark is the bullet just might like to shoot well with a lot of land engagement.
-A 'square mark' guideline can't be used for all barrels, bullet profiles, throat angles and neck tensions.
Good shootin'

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